Remove name inference in class.lua.

class.lua

@@ -66,22 +66,6 @@ local function new(args)
 	class.__is_a = {[class] = true}
 	class.is_a = function(self, other) return not not self.__is_a[other] end
 
-	-- intercept assignment in global environment to infer the class name
-	if not (type(args) == "table" and args.name) then
-		local env, env_meta, interceptor = getfenv(0), getmetatable(getfenv(0)), {}
-		function interceptor:__newindex(key, value)
-			if value == class then
-				local name = tostring(key)
-				getmetatable(class).__tostring = function() return name end
-			end
-			-- restore old metatable and insert value
-			setmetatable(env, env_meta)
-			if env.global then env.global(key) end -- handle 'strict' module
-			env[key] = value
-		end
-		setmetatable(env, interceptor)
-	end
-
 	-- inherit superclasses (see above)
 	inherit(class, unpack(super))